Ceiling Fan Installation, Use and Balancing Q&A

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Dear NH,

This is going to be a dumb question. We have a Hunter ceiling fan, and every
time my boyfriend pulls the cord to shut the fan off, he never lets it stop by
itself. He waits until he can put his hand in there without getting injured and
stops the fan abruptly. I am very upset about this but he says that there is
nothing wrong with doing it because he knows how a fan motor works. I am worried
when he does that he loosens the fan from the ceiling, but he totally disagrees.
What is your opinion?

JB

JB,

I would advise against him stopping the fan with his hand for a few reasons,
some of which have nothing to do with the fan motor. He is correct in that
stopping the fan with his hand will probably not damage the motor directly.
However, there are two other factors to consider... the type of ceiling mount
and the fan blades.

If the fan is mounted strictly in accordance with the current NEC (national
electrical code) which requires using a specially installed ceiling box bridging
across two ceiling joists, he probably won't damage the mount. However, if the
fan is located on an ordinary ceiling box, there is the risk that his maneuver
will eventually loosen the box or even cause the fan to abruptly drop from the
ceiling. Even with the more solid mount, there may be eventual loosening of the
bracket which might not cause the fan to fall but may cause some wobbling. The
bracket is not designed to take that sort of stress.

Even if the fan is securely mounted, there is the issue of the fan blades...
specifically the balancing of the blades. Constant sudden force on the blades
can cause them to become misaligned and out of balance. This can be caused
through slight bending or movement in the blade mounting brackets themselves or
even in slight bending in the blades. Though slight imbalance is not uncommon
and hardly noticeable in most ceiling fans, increased imbalance may cause the
fan to wobble or shake, especially at higher speeds. This misalignment will
become more and more pronounced making the fan become noisier and putting
unnecessary stress on the motor due to the uneven force… in the worst case
possibly leading to motor damage. Though less likely, there is also the chance
that one of the blades may crack, requiring replacement, as they are not
designed to take this type of abuse.

To close out, what your friend is doing may not have any effect at all on
your fan or it may have a disastrous effect. Considering these two possibilities
and the fact that stopping the fan abruptly is a choice and not a necessity, I
think that a better choice can be made... don't touch!

Dear NH,

Do you have any resources for balancing ceiling fans? I am a renter and the
fan is quite noisy, wobbling and shaking. It is a ceiling-mount fan, it looks
new and seems to otherwise be in great shape.

LC

Dear LC,

Ceiling fans are both energy saving and aesthetically a hoot! When I walk
into a room with a slowly revolving ceiling fan, I just want to throw off my
shoes and collapse on the lounge chair… awaiting the next Pina Colada. Of
course, if the lounge chair in under the fan you want to be sure that the fan is
going to stay where it belongs… on the ceiling.

A wobbly fan is usually (but not always) caused by imbalance in the blades
and/or the blade brackets. Though it would be easy to blame poor manufacturing
and quality control, the fact is that perfect balance is almost impossible,
especially since the unit is assembled onsite under "human"
conditions. Just a slight variation in a blade caused by "play" in the
mounting holes can cause a wobble. Fortunately, unless the imbalance is
substantial, the problem only appears when the fan runs at higher speeds.

The first thing to determine is if the fan itself has loosened from its
ceiling mount. Try to move the body of the fan… does it appear to solidly
attached? Be careful… if the mount is very loose it could fall into your
hands! The fan will have a cover or plate that will allow you access to the
mounting screws should you need to tighten them.

If the fan seems firmly attached but the mounting box seems to be moving or
sagging… RED FLAG! You fan may have been mounted onto a non-code electrical
box. Nowadays, all ceiling fans must be mounted onto a special electrical box
that is firmly attached across two ceiling joists with special mounting
brackets. In contrast, typical electrical boxes are only attached to the side of
one joist… great for low weight chandeliers or normal lighting fixtures but
not so great for heavy moving objects! If this appears to be the case, you
should get an electrician to examine the box and if necessary install the proper
supports… or replace the box entirely.

If you are a lucky pumpkin and the fan mounting is secure, examine the
blades. Are all screws tight? Tightening a few loose screws can be all that is
needed to end the wobbling. If all the fasteners are firmly attached, then your
mission, should you decide to accept it, is to balance the blades.

Blade balancing is similar to automobile tire balancing… except you don't
have fancy computerized equipment to help you! It is a matter of trial and error…
attaching small weights to the blades one at a time to determine which blade is
heavier or lighter. There is an excellent FAQ on ceiling fans at Hansen
Wholesale at http://ceilingfans.hansenwholesale.com/.
They explain the entire procedure used to balance a ceiling fan, though they
recommend purchasing a balancing kit. Another website, All About Fans, has a
really gritty and down-to-earth method of balancing that does not require a kit.
Their address is http://www.faninfo.com/.

Dear NH,

Silly as this question may seem, which direction should I have
the ceiling fan set to turn to circulate warm air throughout the
room? Why don't manufacturers mark it with the letter's
"C" or "W" to help those of us that didn't
install the fans ourselves?

K from Louisville, KY

K,

If I had all day I'd list my pet peeves about the lack of
instructions and common sense in product design today. But I
don't, so here's a simple answer...

Ceiling fan blades have an obvious tilt. To push the air
downwards, the top of the blade should be leading when it turns.
To pull the air upwards, the bottom of the blade should be leading
the way!

Generally, most people like to have the air pushing downwards
in the winter to bring the hotter ceiling air to the floor. In the
summer, there are differing opinions. Some folks like to feel the
cool breeze, so set the fan to blow downwards. Other people set
the fan to blow upwards, equalizing the room temperature without
as much of a "breeze".